Author: Lavrukhin, A.
Paper Title Page
THPSC035
 High Voltage Cascade Generators of ELV accelerators  
 
  • D.A. Kogut, I. Chakin, V.G. Cherepkov, E.V. Domarov, S. Fadeev, Yu.I. Golubenko, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov, D.S. Vorobev
    BINP SB RAS, Novosibirsk, Russia
  
  The article considers three versions of high-voltage generators of ELV accelerators: the cuircut with a doubling of AC voltage inside rectifying sections and serious connection of them, the circuit with series-parallel connection of the rectyfying sections, and the scheme is a quadrupling of AC voltage inside sections with the series connection. The scheme of doubling is used in electron accelerators with beam current not to exceed 70mA. Series-parallel scheme is applied in particle accelerators with the maximum beam current of from 66 to 100 mm. These two types of HV generators are used in typical ELV accelerators. The scheme that utilizes the quadrupling voltage rectifying sections are used in accelerators with high gradient of the electric field at the height of the columns. This scheme was tested and prepared for use in research settings.  
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THPSC072 Digital-to-Analog Beam Energy and Current Stabilization of ELV Accelerators 700
 
  • D.S. Vorobev, E.V. Domarov, S. Fadeev, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov
    BINP SB RAS, Novosibirsk, Russia
  
  Funding: Budker Institute of Nuclear Physics, Novosibirsk, Russia.
1.Previous systems of energy and current stabilization are based on analog PID-controllers. They provide good stability at sufficient speed-work. 2.Increased requirements of technological lines to the speed of the accelerator injection to set-up parameters and introduction of technological lines, in which the accelerator is a slave device and should within the shortest possible time to respond onto the changes of operation input parameters, forced us to find the way of stabilization systems improvement. 3.New stabilization system is able to provide current output speed up to 5mA/sec, at required energy stability. 4.Digital-to-analog stabilization is produced as a superstructure on the existing system and is made as a source code added into the basic accelerator control program. This approach enables to modernize simply the existing accelerators. The code itself is two independent parts. The first part is the current beam corrector, which calculate the derivate (current speed) at a time and aims to hold it in set-up range, taking into account the difference of the tasks and the necessity of cathode warm up. The second part is a energy compensator. It adds the current derivate into accelerator energy channel, reducing the energy settlements at once. 5.Present system passed through the testing and it is already installed onto ELV-0.5(0.5MeV, 100mA) accelerator in Qingzhou (a/m tyre production) and onto ELV-8(2.5MeV, 40mA) accelerators in China for cable insulation treatment. 		 
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